I person who shacks up in your bed for a night and destroys it. This person generally hogs the bed, rips the neatly tucked sheets to one side of your bed, and somehow manages to have your comforter hanging halfway off of your bed. These people have also been known to wet your bed as well as puke in it.

Dude, Suzie is a Bedding Crasher, you gonna want to avoid her like the plague.